Heat conductive silicone grease composition and preparation method thereof
A heat-conducting silicone grease and composition technology, which is applied in the field of heat-conducting silicone grease composition and its preparation, can solve the problems of heat-conducting silicone grease losing uniformity, heat-conducting function, density difference, poor compatibility, and complicated processing technology, etc. Achieve the effects of simple preparation method, improved lipophilicity and good application prospects
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Embodiment 1
[0038] In the thermally conductive silicone grease composition, the basic silicone oil is methyl silicone oil with a viscosity of 100mpa s at 25°C; the thermally conductive filler is α-spherical alumina with an average particle size of 15μm; It is 70mpa·s, the hydrogen content is 0.2% (mass percentage), and the coupling agent is γ-aminopropyltriethoxysilane.
[0039] The preparation method of heat-conducting silicone grease comprises the following steps: mix and stir the base silicone oil, oil-inhibiting additive, and coupling agent for 5 minutes according to the stated parts, add the heat-conducting filler in 3 times, stir at 30°C for 1 hour to obtain a mixture, and mix the mixture Grind in a three-roll mill at 40°C for 2 times until the fineness is 20 μm to obtain thermal conductive silicone grease. The test method for fineness refers to the method standard: JJG (Chemical) 018-96" Scraper Fineness Meter" and its GB / T1724-93 standard.
Embodiment 2
[0041] In the heat-conducting silicone grease composition, the base silicone oil is methyl silicone oil with a viscosity of 500mpa·s at 25°C; the heat-conducting filler is zinc oxide with an average particle size of 2 μm and aluminum nitride of 10 μm mixed in a mass ratio of 1:3; oil-suppressing additive It is methyl hydrogen silicone oil, the viscosity at 25°C is 150mpa·s, the hydrogen content is 0.3% (mass percentage), and the coupling agent is hexamethyldisilazane.
[0042] The preparation method of heat-conducting silicone grease includes the following steps: mix and stir the base silicone oil, oil-inhibiting additive and coupling agent for 8 minutes according to the stated parts, add heat-conducting filler in 2 times, stir at 30°C for 1.5 hours to obtain the mixture, and mix The mixture was ground 3 times in a three-roll mill at 50°C until the fineness was 15 μm to obtain thermal conductive silicone grease. The test method for fineness refers to the method standard: JJG (C...
Embodiment 3
[0044] In the thermally conductive silicone grease composition, the base silicone oil is methyl silicone oil with a viscosity of 1200mpa s at 25°C; the thermally conductive filler is boron nitride with an average particle size of 0.8 μm and 5 μm aluminum hydroxide and 10 μm aluminum oxide in a mass ratio of 1: 5:14 mixing; the oil-suppressing additive is hydrogen-containing methyl silicone oil, the viscosity at 25°C is 1000mpa·s, and the hydrogen content is 0.4% (mass percentage).
[0045]The preparation method of heat-conducting silicone grease comprises the following steps: mix and stir the base silicone oil and the oil-suppressing additive for 10 minutes according to the stated parts, add the heat-conducting filler in 3 times, stir at 40°C for 2 hours to obtain a mixture, and place the mixture at 60°C in Grind twice in a three-roll mill until the fineness is 20 μm to obtain thermal conductive silicone grease. The test method for fineness refers to the method standard: JJG (C...
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